You can use your SI ecu, will have a lower rev limit still of only 7200 while that B16A goes to 8200 happily so that would be one draw back. Also cann't hook up the Knock sensor, and I'm unsure if the SI has a air temp sensor that will prevent cold V-tec, Knock sensor I know SOHC dont have. Get a 93-97 Del Sol DOHC ECU or a 92-93 Integra GS-R ecu both will plug in and give you the rev limit and better fuel maps, or get you P28 chips and reprogramed also and that will fix the rev limit and air/fuel curves.